网桥怎样知道网络端口连接了哪些网站 （ ）。当网桥连接的局域网出现环路时怎么办 （ ）。
问题1选项
A.如果从端口收到一个数据帧，则将其目标地址记入该端口的数据库
B.如果从端口收到一个数据帧，则将其源地址记入该端口的数据库
C.向端口连接的各个站点发送请求以便获取其MAC地址
D.由网络管理员预先配置好各个端口的地址数据库
问题2选项
A.运行生成树协议阻塞一部分端口
B.运行动态主机配置协议重新分配端口地址
C.通过站点之间的协商产生一部分备用端口
D.各个网桥通过选举产生多个没有环路的生成树
正确答案及解析
正确答案
解析
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